/* ===== 帮助中心 / page-faq ===== */
.page-faq {
  --faq-line: rgba(20, 16, 13, .13);
  --faq-rule: rgba(0, 102, 255, .28);
  --faq-body: #3B352D;
  --faq-sticky-top: 72px;

  display: block;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.75;
  padding-bottom: 88px;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after { box-sizing: border-box; }

.page-faq .mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 22px 0 44px;
  background:
    radial-gradient(110% 82% at 94% -18%, rgba(123, 47, 242, .16), transparent 62%),
    radial-gradient(92% 70% at 2% 0%, rgba(0, 102, 255, .13), transparent 60%),
    linear-gradient(180deg, rgba(220, 233, 255, .88), rgba(246, 241, 230, 0) 84%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue) 0%, var(--violet) 48%, var(--orange) 100%);
}

.page-faq .breadcrumb { margin-bottom: 24px; }

.page-faq .faq-hero__grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero__lead .eyebrow {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--blue-deep);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(29px, 8.2vw, 50px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.02em;
}

.page-faq .faq-hero h1 em {
  font-style: normal;
  color: var(--blue);
  background: linear-gradient(transparent 63%, rgba(255, 107, 0, .34) 63%);
  padding: 0 2px;
}

.page-faq .faq-hero__intro {
  margin: 0 0 24px;
  max-width: 38em;
  font-size: 16px;
  color: var(--faq-body);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 6px 14px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .72);
}

.page-faq .faq-hero__facts .mono {
  font-size: 14px;
  font-weight: 700;
  color: var(--blue);
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  box-shadow: 12px 14px 0 -2px rgba(0, 102, 255, .16), var(--shadow-panel);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 主题索引带 ---------- */
.page-faq .faq-topics {
  margin-top: 6px;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  background: rgba(255, 255, 255, .7);
  backdrop-filter: blur(8px);
}

.page-faq .faq-topics__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 10px;
  padding-bottom: 10px;
}

.page-faq .faq-topics__label {
  flex: none;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-topics__list {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 4px 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-topics__list::-webkit-scrollbar { display: none; }

.page-faq .faq-topics__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--ink);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-topics__link .mono {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--blue);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-topics__link:hover,
.page-faq .faq-topics__link:focus-visible {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
  transform: translateY(-1px);
}

.page-faq .faq-topics__link:hover .mono,
.page-faq .faq-topics__link:focus-visible .mono { color: rgba(255, 255, 255, .78); }

/* ---------- 高频索引 ---------- */
.page-faq .faq-quick { padding-top: 62px; }

.page-faq .faq-quick__head { margin-bottom: 26px; }

.page-faq .faq-quick__head .eyebrow {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-quick__title {
  margin: 0 0 8px;
  font-size: clamp(23px, 5.6vw, 34px);
  font-weight: 900;
  letter-spacing: -.015em;
  line-height: 1.24;
}

.page-faq .faq-quick__sub {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
}

.page-faq .faq-quick__grid {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-card {
  position: relative;
  display: grid;
  gap: 6px;
  height: 100%;
  padding: 20px 20px 20px 24px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-m);
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.page-faq .faq-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--blue), var(--violet) 62%, var(--orange));
  transform: scaleY(.32);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-card:hover,
.page-faq .faq-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--faq-rule);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-card:hover::before,
.page-faq .faq-card:focus-visible::before { transform: scaleY(1); }

.page-faq .faq-card__num {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--blue);
}

.page-faq .faq-card__q {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}

.page-faq .faq-card__a {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-top: 68px;
  scroll-margin-top: 132px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  column-gap: 14px;
  row-gap: 8px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--ink);
}

.page-faq .faq-group__num {
  padding: 2px 9px;
  border: 1px solid var(--faq-rule);
  border-radius: 6px;
  background: rgba(0, 102, 255, .07);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--blue);
  line-height: 1.6;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 5.2vw, 30px);
  font-weight: 900;
  letter-spacing: -.015em;
  line-height: 1.26;
}

.page-faq .faq-group__note {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list { border-top: 1px solid transparent; }

.page-faq .faq-q {
  position: relative;
  border-bottom: 1px solid var(--faq-line);
  scroll-margin-top: 132px;
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-q::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--orange);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-q[open]::before { transform: scaleY(1); }

.page-faq .faq-q[open] {
  background: linear-gradient(90deg, rgba(255, 227, 209, .5), rgba(255, 227, 209, 0) 64%);
}

.page-faq .faq-q__q {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 20px;
  align-items: baseline;
  gap: 10px;
  padding: 18px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.58;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-q__q::-webkit-details-marker { display: none; }
.page-faq .faq-q__q::marker { content: ""; }

.page-faq .faq-q__q:hover { color: var(--blue-deep); }

.page-faq .faq-q__num {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--blue);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-q[open] .faq-q__num { color: var(--orange); }

.page-faq .faq-q__text { display: block; }

.page-faq .faq-q__mark {
  position: relative;
  align-self: center;
  width: 18px;
  height: 18px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--ink);
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-q__mark::before { width: 12px; height: 2px; }
.page-faq .faq-q__mark::after { width: 2px; height: 12px; }

.page-faq .faq-q[open] .faq-q__mark::before { background: var(--orange); }
.page-faq .faq-q[open] .faq-q__mark::after { transform: translate(-50%, -50%) scaleY(0); }

.page-faq .faq-q__a {
  padding: 0 16px 22px 56px;
  animation: faq-slide .22s var(--ease);
}

.page-faq .faq-q__a p {
  margin: 0 0 12px;
  max-width: 42em;
  font-size: 15px;
  color: var(--faq-body);
}

.page-faq .faq-q__a p:last-child { margin-bottom: 0; }

@keyframes faq-slide {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 排查步骤 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 9px;
  margin: 6px 0 14px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 11px 14px;
  border-left: 2px solid rgba(0, 102, 255, .42);
  border-radius: var(--radius-s);
  background: rgba(0, 102, 255, .06);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--faq-body);
}

.page-faq .faq-steps__dot {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 11px;
  line-height: 1;
}

/* ---------- 提示块 ---------- */
.page-faq .faq-note {
  margin: 14px 0 0;
  padding: 12px 16px;
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-s);
  background: var(--orange-sand);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 安卓端图文区 ---------- */
.page-faq .faq-android {
  display: grid;
  gap: 28px;
  padding-top: 4px;
}

.page-faq .faq-android__media {
  margin: 0;
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-android__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 联系渠道 ---------- */
.page-faq .faq-channels {
  display: grid;
  gap: 12px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-channel {
  display: grid;
  gap: 4px;
  padding: 18px 20px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-m);
  background: var(--panel);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-channel__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-channel__value {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--blue-deep);
  word-break: break-all;
}

.page-faq .faq-channel__hint {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 延伸入口 ---------- */
.page-faq .faq-next {
  margin-top: 40px;
  padding: 26px 24px;
  border-radius: var(--radius-l);
  background:
    linear-gradient(135deg, rgba(11, 16, 48, .96), rgba(0, 71, 179, .92) 62%, rgba(123, 47, 242, .9));
  color: #fff;
}

.page-faq .faq-next__lead {
  margin: 0 0 18px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(220, 233, 255, .92);
}

.page-faq .faq-next__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-next__list a {
  display: block;
  padding: 11px 4px;
  border-bottom: 1px solid rgba(220, 233, 255, .18);
  color: #fff;
  font-size: 14.5px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-next__list li:last-child a { border-bottom: 0; }

.page-faq .faq-next__list a:hover,
.page-faq .faq-next__list a:focus-visible {
  color: var(--orange-sand);
  padding-left: 12px;
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-quick__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .faq-channels { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-faq .faq-next { padding: 32px 34px; }
  .page-faq .faq-next__list { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 28px; }
}

@media (min-width: 760px) {
  .page-faq .faq-q__q {
    grid-template-columns: 38px minmax(0, 1fr) 24px;
    gap: 14px;
    padding: 20px 22px;
  }
  .page-faq .faq-q__a { padding: 0 22px 24px 74px; }
  .page-faq .faq-steps li { grid-template-columns: 26px minmax(0, 1fr); padding: 12px 18px; }
}

@media (min-width: 940px) {
  .page-faq .faq-hero { padding: 30px 0 58px; }
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 56px;
    align-items: center;
  }
  .page-faq .faq-topics {
    position: sticky;
    top: var(--faq-sticky-top);
    z-index: 6;
  }
  .page-faq .faq-quick { padding-top: 78px; }
  .page-faq .faq-quick__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-faq .faq-group { padding-top: 86px; }
  .page-faq .faq-android {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 44px;
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-list { padding-left: 4px; }
  .page-faq .faq-android { grid-template-columns: minmax(0, 1fr) 300px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q__a { animation: none; }
  .page-faq .faq-card,
  .page-faq .faq-topics__link,
  .page-faq .faq-card::before,
  .page-faq .faq-q::before,
  .page-faq .faq-next__list a {
    transition: none;
  }
}